planner

## Constructing an Ellipse Feature

Construct Ellipse dialog box

There are several ways to construct an ellipse using Planner. The following table lists the various types of constructed ellipses, along with their necessary inputs. Some features may require no inputs while others may require three inputs or more. The term "Any" in the following table indicates that the construction can take any type of feature as input for construction. Planner allows the features to be selected in any order.

CONSTRUCT FEATURE TYPE | SYMBOL IN EDIT WINDOW | # OF INPUT FEATS | FEAT #1: | FEAT #2: | COMMENTS
Auto Ellipse | - | - | - | - | See "Auto Ellipse Construction".
Best fit Ellipse | BF | At least 4 inputs are needed or a scan or set with 4 points. | - | - | Constructs a best fit ellipse using the given inputs. See the Note below for recommended inputs.
Best fit with Recompensate Ellipse | BFRE | At least 4 inputs--with one input being a point--are needed or a scan or set comprised of at least 4 points. | - | - | Constructs a best fit ellipse using the given inputs. See the Note below for recommended inputs.
Intersection | INT | 2 | Cylinder | Plane | Constructs an ellipse at the intersection of the input features.
Cast Ellipse | CAST | 1 | Any | - | Constructs an ellipse at the centroid of the input feature.
Project Ellipse | PROJ | 1 or 2 | Any | Plane | One input feature will project the ellipse to the workplane.
Reverse Ellipse | REV | 1 | Ellipse | - | Constructs an ellipse with a reversed vector.

If you select inappropriate feature types, Planner displays "Cannot construct [feature]. Combination of input features not accepted." on the status bar.

To construct an ellipse:

1. Open the Construct Ellipse dialog box (Insert | Feature | Constructed | Ellipse).

2. Enter the desired features.

3. Select the In or Out option.

4. Select the method of construction. Available options include:

- Auto Circle

- Best Fit or Best Fit Recompensate Ellipse

- Cast Ellipse

- Projection Ellipse

- Reverse direction Ellipse

5. Some ellipse types have additional options or items that appear in the dialog box when selected. Select or use these options as needed.

6. Click the Create button.

When two or more features are involved, Planner automatically determines the necessary order of the input features. This improves the accuracy of the measurement process.

The following topics describe the available options for constructing an ellipse:

More:

In / Out Ellipses

2D / 3D Ellipse

Constructing a Best Fit or Best Fit Recompensate Ellipse

Constructing an Intersect Ellipse

Constructing a Cast Ellipse

Constructing a Projected Ellipse

Changing the Direction of an Ellipse

Auto Ellipse Construction